When it comes to achieving fuller, longer, thicker hair, there are a few superstar ingredients that hair experts lean on time and time again, and one of those go-tos is biotin. Also known as vitamin B7, biotin is known for energy production and available in supplement form; it's also added to haircare products like shampoos and conditioners in an effort to enhance hair health. If you've ever looked into how to grow your hair faster, it's likely you've come across the buzzy ingredient. It's believed that biotin can help improve hair growth, give fine hair a boost in volume and even help reduce hair loss and thinning.
But can biotin in shampoo really work to regrow hair or prevent hair loss?
Unfortunately, the answer is that it's not likely, since shampoos are rinsed off hair and don't spend an extended amount of time touching the scalp, the experts in the Good Housekeeping Institute Beauty Lab explain. But while they may not grow hair, when biotin shampoos are applied topically, there is some limited evidence that they may strengthen existing strands and minimize breakage, says Hadley King, M.D. , a dermatologist in New York City. "Hair loss is a symptom of biotin deficiency, so biotin supplementation is thought to benefit people with hair loss or hair thinning," she adds. Still, even though biotin is often touted as a hair growth ingredient, there's not enough evidence to prove its effectiveness at growing hair, Dr. King says.
That said, shampoos infused with biotin can provide benefits like deep cleaning and boosting fullness, leaving hair feeling purified, and looking healthier and more lush — making it a great choice for thinning hair, in particular. While the GH Beauty Lab hasn't formally tested biotin shampoos in our labs, our analysts and chemists are constantly testing shampoos — including shampoos for color-treated hair, clarifying shampoos, volumizing shampoos and custom shampoos — and ranking them based on how well they cleanse hair and lather, if they're irritating, sensorial attributes like scent and texture and how hair looks and feels after use, among many other factors. In short, our experts know which brands to trust and what to look for when it comes to buying a good shampoo.
Below, we've rounded up the best biotin shampoos to add to your haircare arsenal, based on GH Beauty Lab expertise, editor favorites and top-reviewed picks by online shoppers: